下列哪一项能直接反映血浆碱储备的过多或不足（）。
A.二氧化碳分压
B.标准碳酸氢盐
C.实际碳酸氢盐
D.缓冲碱
E.碱剩余
参考答案：E
The house is too small for his family ______. [ ]
A. to live in
B. living in
C. live in
D. lives in
用所给词的适当形式填空
1. Look! Whose ________ (Walkman) are these? Perhaps they are the twin's.
2. Is there an ________ (electric) shop in your town?
3. Amy wants to buy some presents for ________ (they).
4. Do you understand the ________(mean) of the new world?
5. Do you like to have cold ________ (drink)?
6.We usually go ________ ( shop )on Sundays.
7. Listen !Someone ________ ( knock )at the door.
